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Model(s): 1994-95 Buick Regal 1994-97 Buick Skylark 1994-98 Buick Century 1994-95 Chevrolet Beretta Corsica, Lumina, Monte Carlo 1996-98 Chevrolet Venture 1997-98 Chevrolet Malibu 1993-97 Oldsmobile Cutlass Supreme 1994-96 Oldsmobile Cutlass Ciera 1994-97 Oldsmobile Achieva 1996-98 Oldsmobile Silhouette 1997-98 Oldsmobile Cutlass 1994-98 Pontiac Grand Am, Grand Prix 1996-98 Pontiac Trans Sport with 3100, 3400 V6 Engine (VINs M, E – RPOs ticking type noise that begins shortly after cold engine start-up and gradually diminishes as the engine warms up. In most cases, the noise is gone after five (5) minutes. In severe cases, the noise may not disappear when lhe engine is hot. Under normal design tolerances when the piston pin bore is produced at the maximum tolerance and the piston pin is produced at the minimum tolerance (min-max tolerance) trace noise levels can occur. This level of noise does not affect the reliability or durability of the product. If piston-to-pin noise is detected and the customer desires the condition to be corrected, replace all six pistons with pin assemblies. The new piston sets have a minimal piston-to-pin clearance. Remember, piston-to-pin noise occurs in both park and drive at engine idle rpm and it varies in intensity depending on the number of pistons involved. A ticking sound means one piston is affected whereas a rattle or diesel type sound indicates more than one piston affected. The following should also be checked: 1. On W-Cars, make sure the right side engine splash shield is not contacting the engine crankshaft balancer. This condition usually happens cold and is caused by the shield curling when cold. 2. Reference Service Bulletin 57-71-06 for transmission rattle noise often confused for engine rattle noise. 3. Reference Service Bulletin 47-61-36 for Accessory Drive Belt Tensioner noise. 4. Check cylinder bore diameter and piston diameter as outlined in the Service Manual.

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1993 Chevrolet Camaro 3.4L 1995 Chevrolet Camaro 3.4L, Vin S 1994 Buick Skylark Custom 3.1L, Vin M, 1995 Chevrolet Lumina 3.1L Eng Cfg V6 1994 Chevrolet Corsica 3.1L, Vin M, Eng 1995 Pontiac Grand AM SE 3.1L, Vin M, Cfg V6 Eng Cfg V6 1994 Oldsmobile Cutlass Supreme S 3.1L, 1995 Pontiac Grand Prix SE 3.1L Vin M DTC 77. 1. Remove the throttle body, and inspect the Exhaust Gas Recirculation Valve (EGR) port in the intake plenum. 2. The passage plugs at the bottom where it dumps into the plenum. 3. Best to use an old speedometer cable in a drill to run inside the passage to knock all the carbon out. Restricted Exhaust Gas Recirculation (EGR) Passages When an EGR solenoid is activated by the Powertrain Control Module (PCM), the PCM monitors the change in the Manifold Absolute Pressure (MAP) reading. Carbon deposits anywhere in the EGR passageways will set this code.

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Models: 1992-94 Buick Skylark 1993-96 Buick Park Avenue 1989-92 Cadillac Allante 1991-93 Cadillac Eldorado, Seville 1991-95 Cadillac DeVille 1991-95 Oldsmobile Ninety Eight 1992-93 Oldsmobile Achieva 1994-99 Pontiac Bonneville This bulletin is being revised to clarify when this bulletin may be used to turn the service suspension lamp off. Also, a step has been added to the 1991 Cadillac Eldorado and Seville repair. Please discard Corporate Bulletin Number 00-03-11-001 (Section 3 – Suspension). Some owners may bring their vehicles in for service with an illuminated service suspension light. The service suspension indicator lamp is telling the owner that the vehicle is due for strut/shock replacement, a maintenance item. The customer may elect to have passive struts installed in their vehicles due to repair cost savings and/or parts availability. The installation of passive shock/struts will result in handling characteristics which are the equal to a like vehicle without the computer controlled ride, with all other components such as tires, tire pressure, springs, etc. being equal. The installation of (4) new passive struts will cause the continued illumination of the service suspension indicator. If desired by the customer, the service indicator may be disabled AFTER THE INSTALLATION OF THE (4) NEW PASSIVE STRUTS, using the appropriate service procedure listed below. This bulletin DOES NOT authorize this procedure unless (4) NEW PASSIVE STRUTS WERE INSTALLED ON THE VEHICLE.

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Models: 1992-94 Buick Skylark 1993-96 Buick Park Avenue 1989-92 Cadillac Allante 1991-93 Cadillac Eldorado, Seville 1991-95 Cadillac DeVille 1991-95 Oldsmobile Ninety Eight 1992-93 Oldsmobile Achieva 1994-99 Pontiac Bonneville This bulletin is being revised to clarify when this bulletin may be used to turn the service suspension lamp off. Also, a step has been added to the 1991 Cadillac Eldorado and Seville repair. Please discard Corporate Bulletin Number 00-03-11-001 (Section 3 – Suspension). Some owners may bring their vehicles in for service with an illuminated service suspension light. The service suspension indicator lamp is telling the owner that the vehicle is due for strut/shock replacement, a maintenance item. The customer may elect to have passive struts installed in their vehicles due to repair cost savings and/or parts availability. The installation of passive shock/struts will result in handling characteristics which are the equal to a like vehicle without the computer controlled ride, with all other components such as tires, tire pressure, springs, etc. being equal. The installation of (4) new passive struts will cause the continued illumination of the service suspension indicator. If desired by the customer, the service indicator may be disabled AFTER THE INSTALLATION OF THE (4) NEW PASSIVE STRUTS, using the appropriate service procedure listed below. This bulletin DOES NOT authorize this procedure unless (4) NEW PASSIVE STRUTS WERE INSTALLED ON THE VEHICLE.

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AXLE SHAFTS – FRONT 1991-92 DRIVE AXLES FWD Axle Shafts Axle shafts transfer power from transaxle to drive wheels. Axle shafts consist of a shaft and flexible Constant Velocity (CV) joint at each end. See Fig. 1 . Inner CV joint is splined to transaxle. Outer CV joint is splined to hub assembly and secured by wheel bearing lock nut. Inner CV joint is a plunging tripod joint. The plunging action allows for axle shaft length change as suspension Inner and outer CV joints are enclosed by a CV joint boot. The boot maintains lubrication in the joint and prevents contamination of CV lubricant. Boots must be replaced when leakage or cracks are present. The inner CV joint can be repaired without replacing assembly. The outer CV joint must be replaced as an assembly.